Entanglement of Atomic Qubits using an Optical Frequency Comb

TL;DR

This paper demonstrates how an optical frequency comb can be used to coherently control and entangle atomic qubits, enabling high-fidelity quantum gates and potential applications to complex quantum systems.

Contribution

It introduces a novel method using ultrafast laser pulses and frequency combs for entangling atomic qubits with high fidelity, extending to faster operations and larger systems.

Findings

Successful entanglement of atomic qubits using optical frequency combs

High-fidelity quantum logic gates achieved

Potential for faster operations in quantum systems

Abstract

We demonstrate the use of an optical frequency comb to coherently control and entangle atomic qubits. A train of off-resonant ultrafast laser pulses is used to efficiently and coherently transfer population between electronic and vibrational states of trapped atomic ions and implement an entangling quantum logic gate with high fidelity. This technique can be extended to the high field regime where operations can be performed faster than the trap frequency. This general approach can be applied to more complex quantum systems, such as large collections of interacting atoms or molecules.